The Mechanism of Fretting and the Influence of Temperature

Hurricks, P.L.

doi:10.1108/eb053103

Cited by 11 publications

(1 citation statement)

References 23 publications

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“…Wear literally means the progressive loss of material from surfaces from their fracture due to friction interaction, gradually changing the dimensions and shape of the contacting bodies [26][27][28][29][30][31][32][33]. The aluminum pad and probe tip continuously make contact in probe cards.…”

Section: Wearmentioning

confidence: 99%

A robust MEMS probe card with vertical guide for a fine pitch test

Kim

Choi

et al. 2007

J. Micromech. Microeng.

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A vertically guided MEMS probe card was designed to deflect 50 µm at a force of 1.5 g and achieve less than 50 µm of pad pitch. Based on our experimental results, the measured average contact resistance of a device under test (DUT) was approximately 0.2 Ω at 1.44 g of force and the leakage current between two tips in the distance of one pitch was about 10 pA. In addition, tip planarity was about ±6 µm with x–y alignment errors within ±8 µm. A reliability test showed that the average contact resistance was 0.34 Ω and the probe tip wear was less than 1 µm after the 10 000 timed touchdowns. To be capable of fine pitch probing, a cantilever beam was constructed by dry etching using a positive photoresist. After the cantilever beam was formed by silicon etching using a deep RIE etcher inside a deep-recessed trench, a vertically guided structure was created from the cantilever beam. Furthermore, to make a horizontally stopped structure, the cantilever beam was designed to have a pyramid tip with a width bigger than that of the beam itself. This kind of structure is mechanically stable when the tip is applied with an oblique force. Because the probe card can be guided vertically and horizontally, it can be neither broken nor deformed by any directional force. In that respect, this newly proposed probe card is suitable for wafer-level testing and fine pitch device testing.

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